Paper-pulp screen.



C. E- POPE.

PAPER PULP SCREEN.

APPLICATWN FILED DEC- 11. 192- L16fi%9w Patented Nov. 16, 1915,

2 SHEETS-SHEET I.

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PAPER PULP SCREEN.

APPLICATION FILED DEC-11' I912.

Pafente Nov. 16, 1915.

2 SHEETS-SHEET 2- WITNESSES.-

1N VENTOR,

fliidrlmflpapa.

U'HhlttLES acre; or HOLYOKE,

r. renames son, INCORPORATED, rronor nasshonusnrrs.

specification of Letters Patent.

MASSACHUSETTS, ASSIGNOR OF THREE-FIFTHS T0 0F HOLYOKE, MASSACHUSETTS, A CORPORA- PAPER-PULP SCREEN.

Patented Nov, lid, tilt-ii.

application filed December 11, 912. Serial No. 736,171.

To all whom it may concern:

Be it known that l, GnARLEs E. POPE, a citizen of the United States of America, residing at 'Holyoke, in the county of Hampden and State oi Massachusetts, have invented new and useful Improvements in Paper-Pulp Screens, of which the followin; is a specification.

This invention relates to a paper-pulp screen of the rotary type having improved construction.

It has heretofore'been the practice in the rotary-type pulp screen to rotate a cvlindri-' cally-formed'screen (within which the pulp fed) in a stationary tank, the pulp pass ing through the screen to the tank. In order to cause the pulp topass readily through the screen and prevent the latter from clogging, the cylindrical screen while rotating is vibrated up and down or con' tinually jogged, which action frees the pulp from the screen openings. As the screen travels along the top of its path, a streamof water is passed through the openings to wash them clear, a suitable receptacle being arranged to catch the wash-Water and lead it from the apparatus. The disadvanta 'e of both rotating and vibrating the cylin rical screen is that considerable mechanism, and a. rather complicated arrangement thereof, is required to give the two movements.

The object of this invention is to avoid; the disadvantage mentioned by arranging the mechanism only for the rotating movement of the screen and by causing the-flow of the pulp'through the screen heretofore caused. by the vibration thereof by the use of mechanism. causing an up and down flow of the pulp in thetank as thescreen' ro ta therein? I it. further-object of the invention is to, ride an improved construction of rotator injured parts making over the screen whereby worn may be renewed Without whole screen.

it. still further object is to provide in com nection with the rotating screen means to elevate dirt, sediment, and such matter as would not be elevated by the screen sections. proper to the upper path of the cylinder path in order that the stream of water there situated may wash it away.

d ith these objects in view, an illustrative embodiment of the invention in one of its .03 supplies power loeing fastened rotation of cam causes rod 71 to follow the cam. It is clear clear.

preferred forms is specifically disclosed herewith.

In the drawings, Figure 1 is a front elevation of the improved apparatus with parts obviously like the parts shown cut away. F jg. 2 is a cross-section taken through the appazl'atus, looking toward the end shown in In the drawings the operative parts of the machine are all mounted on a suitable supporting frame 6. The rotatable screen nis arranged in suitable bearings to turn in the tank m. A belt-connection with shaft to turn the screen it through the gear-connections e and to turn thecam-shaft o by the chain-connection, all shown in Fig. 1.

The pipeia serves as an inlet -For the pulp to be screened, which is fed steadily through the openings or opening shown in Fig. 2. As the pulp,,passes through the openings in the screen vhich' screen will be hereinafter specifically described), the larger pieces and much foreign matter are, separated. The continuous slow rotation. of the screen tends to prevent the. clogging of the openings therein. In order clogging, the screenhas a stream oi Washwater directed therethrough during its travel over its upper path from the pipe 7. This Water drives the dirt from ings into a pan-shaped receptacle 0 from which it passes out of the machine at either 'end'to any suitable point.

' The inechanismto cause an up-and-down flow of the pulp in the tank will now be described. A diaphragm is formingthe bot tom of the tank is'supported at its edges by to the tank. The central portion of the diaphragm is fastened to a plate Z mounted on the vertical rod 79, which, in turn, is fastened to a cross-spring-mem- .ber a adjustably fastened in the frame I) by devices 7'. The plate Z, and consequently diaphragm is, is

g. The springanember if that the up-anol-olown movement of cliaphragnr 70 will cause the pulp to How through the scieen openings, keeping them T-ltis action'will be much the same in effect as if the screen Weremovecl up and down as it rotates; The diaphragm is may be made. up in sections extending along the open-;

vibrated rapidly by the in said pockets while passing them upper tank ejnol to empty grzidual lyduring their most path, whereby the sediment or set- "upper travel, a receptacle arranged Within filings in said pockets are Washed out and the screen below the uppermost pathpf said thus separated from the pulp in the tank. pob'ket-forming devices to receive the last CHARLES E. POPE. ciiseharge portions fronp the pockets, and means arrangmi to direct a streampf water Witnesses:

FRANKLIN G. NEAL, K. I. 'GLEMONS. 

